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| Pregunta | Respuesta |
| What is a Random Variable? | A mapping from each outcome to a real number |
| What is Pr(Y = 2) ? | 1/2 |
| What is E(Y)? | 7/2 |
| According to Linearity of Expectation, what is this expression equal to? | |
| What is an Indicator Random Variable? | A random variable that can only be a 0 or 1. It has the property: E(I) = Pr(I = 1), where I is the indicator random variable. |
| What is Markov's Inequality? Suppose the mean speed on a motorway is 120 mph. What is Pr(X >= 240) given that X is a random variable denoting the speed of 1 car? | 1/2 |
| If X is a non-negative random variable that only takes integer values. What is Pr(X > 0) equal to, and that is less value less than or equal to according to Markov's Inequality. | |
| Let V1, ... , Vk be k events. What can you say about this expression? | |
| What is the upper and lower bounds on: |
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